<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>圆周长面积计算</title>
    <link rel="stylesheet" href="css/style.css">
</head>
<body>


    <input type="text" placeholder="半径" id="a">
    <div class="wn">
        <input type="text" placeholder="周长" id="d">
        <input type="text" placeholder="面积" id="c">
    </div>

    <div class="nn">
        <div class="nn1">
            <input type="text">
            <span>半径</span>
        </div>

        <div class="nn2">
            <input type="text">
            <span>周长</span>
        </div>

        <div class="nn3">
            <input type="text">
            <span>面积</span>
        </div>
    </div>




<script src="js/script.js"></script>
</body>
</html>